Furnace for perfecting combustion.



G MEYER FURNACE FOR PERFEOTING COMBUSTION. APPLICATION FILED MAB-.1,1910. RENEWED FEB. 6, 1911. 1,003,9 Patented Sept. 19,1911.

. J. PAUL, J. H. LYNCH & J.

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UNITED STATES PATENT QFFICE.

WILLIAM J. PAUL, JOHN H. LYNCH, AND JAMES G. MEYER, 0F MATTEAWAN, NEW

YORK.

FURNACE FOB PERFECTING COMBUSTION.

Specification of Letters Patent.

Patented Sept. 19, 1911.

Application filed March 1, 1910, Serial No. 546,717. Renewed February 6,1911. Serial No. 606,863.

To all whom it may concern:

Be it known that We, \VILLIAM J. PAUL,

- JOHN H. LYNCH, and JAMES G. MEYER, all

citizens of the United States, residing at Matteawan, in the county ofDutchess and State of New York, have invented new and usefulImprovements in Furnaces for Pertypes of furnaces and ovens, but is hereown as applied to a return tubular boiler furnace.

The invention consists in directing the products of primary combustionfrom the furnace through a series of continuous, unbroken, unobstructedcombustion and heat radiating tubes, flues or like passages, preferablyarranged longitudinally, which tubes or flues receive the products ofprimary combustion, confine them within their area throughout theirentire length, bringing the gases into intimate relation and maintainingsuch intimate relation throughout the entire length and area of thetubes or flues; the

said gases,so confined, are ignited by the heat from the furnace, thecombustion produced thereby heats the tubes or flues to a hightemperature, thereby producing oombustion within the area of the saidtubes or flues and throughout their entire length, highly heating thegases from the furnace passing into them, burning the same, therebyconsuming the inflammable gases, and since the body to be heated isexposed, the highly heated incandescent tubes or flues give ofi' theirradiant heat to said exposed body.

The construction of the improved furnace will be fully describedhereinafterin connection with the accompanyin drawings which form apartof this. specification, and its features of novelty will be set forthand defined in the appended claims.

In the drawings: Figure 1 is a view in perspective, partly broken away,of a return tubular boiler furnace, embodying the invention. Fig. 2 is alongitudinal section of the same. Fig. 3 is a transverse section on theline 33 of Fig. 2.

The reference numeral 1 designates a boiler supported in the usualmanner by the furnace walls above the grate 2, and the bridge-wall, 3.On the bridge-wall, 3, within the space usually termed combustionchamber and which in an ordinary furnace is an open, unobstructed spaceor chamber are located a series of combustion and heat radiating tubes 4constructed of fire clay, or other suitable material. These tubes orflues are arranged as shown, longitudinally of the boiler and parallelthereto and directly within the line of draft from the fire-box. Thegases from the furnace thus pass into a series of continuous, unbroken,unobstructed tubes, flues or like passages, which tubes or flues receivethe said gases, confine them within their area throughout their entirelength, bringing the gases into intimate relation and maintaining suchintimate rela tion throughout the entire length and area of the tubes orflues; the said gases being so confined and ignited by the heat from thefurnace, the combustion produced thereby heats the tubes or flues to ahigh temperature throughout their entire length, hlghly heating thegases from the furnace passing into them, and thus heating of the tubesor flues results in the conversion of all inflammable gases andsubstances into heat units of high value, and such increased orintensified heat then passes into the boiler tubes.

Our experiments have demonstrated that the combustion of all gases andvapors, within the incandescent tubes, renders the discharge from thefurnace stack smokeless, only non-inflammable vapors remaining after thepassage of the furnace gases into the tubes.

\Ve desire it to be understood that one of the important features of ourinvention resides in the fact, that the tubes or flues 1, serve both ascombustion and heat radiating tubes or flues, hence the body to beheated being exposed, said body is subjected to the radiant heattherefrom, and the tubes or flues are of such'length as to insuresubstantially complete combustion Within the area thereof.

While it is not desired toconfine the invention to any specific meansfor supporting the tubes, or to any special form of tubes orlongitudinal passages, the tubes and sup ports therefor, shown in thedrawings, have been found practicable for efiicient service for boilerfurnaces. The polygonal outer surfaces of the tubes, shown in thedrawings, give an extended area of radiation, and the supports 5 of firebrick are formed with openings through which the tubes extend. Thismanner of supporting the tubes permits of their ready insertion andremoval when necessary, but any form of tube or flue will perform thesame service. The supports for the tubes, as shown in the drawing, areshown as resting upon the bottom of the combustion chamber.

The entire volume of gases from the furnace pass into the series ofincandescent tubes or fines thereby converting the furnace gases into afixed gas of high heat value which is immediately distributed throughthe combustion chamber and the boiler tubes, retaining its high heatvalue throughout the distribution over the radiating surfaces andpassing to the stack.

In describing the tubes or flues 4 as continuous, unbroken, andunobstructed, we wish it to be understood that there are no openings ofany kind or nature in the said tubes, except the opening at either endof the tubesthrough which the said gases leave the said tubes or fiues,and that the gases passing thereinto have an unobstructed passagetherethrough and are not permitted to expand through any holes oropenings in the surface of the said tubes or fines during their passagethrough the said tubes or fines, and'it is this feature of the inventionthat produces the desired results, as an expansion of the gases, exceptin the manner above set forth, necessarily results in the lowering ofthe flame temperature, a result which the present construction avoids.

It will be perceived that the tubes or lines at are imperforate; thatthey do not com municate one with another; further, it will be seen thatthese tubes or lines are of the same cross-sectional area throughouttheir length and through which the gases must freely flow.

Having thus described our invention what we desire to secure by LettersPatent and claim is l. A furnace or oven comprising, a firechamber, abank of spaced combustion and heat radiating tub-es, disposed within theline of draft and in free communication with the said chamber, means forsupporting said tubes without materially affecting the temperature orthe radiating surfaces thereof, and a body to be heated exposed to theradiant heat from said tubes, whereby said tubes may be maintained at ahigh temperature and the said body heated by radiation.

2. A furnace or oven comprising, a firechamber, a bank of spacedcombustion and heat radiating tubes, disposed wit-11in the line of draftand in free communication with the said chamber, the tubes being of suchlength as to insure substantially complete combustion within the areathereof, means for supporting said tubes without materially affectingthe temperature or the radiating surfaces thereof, and a body to beheated exposed to the radiant heat from said tubes, whereby said tubesmay be maintained at a high temperature and the said body heated byradiation.

3. A furnace or oven comprising, a firechamber, a bank of spacedcombustion and heat radiating tubes, disposed within the line of draftand in free communication with the said chamber, the tubes being of suchlength as .to insure substantially com plete combustion within the areathereof, means for supporting said tubes without materially affectingthe temperature or the radiating surfaces thereof, and a body to beheated exposed to the radiant heat from said tubes, whereby said tubesmay be maintained at a high temperature and the said body heated byradiation, said bank of tubes extending from the fire-chamber to a pointat or near the rear end of the body to be heated.

4. A furnace or oven comprising, a firechamber, a bank of continuous,unobstructed, imperforate non-communicating combustion and heatradiating tubes, disposed within the line of draft and in freecommunication with the said chamber, the tubes being of such length asto insure substantially complete combustion within the area thereof,means for supporting said tubes without materially affecting thetemperature or the radiating surfaces thereof, and a body to be heatedexposed to the radiant heat from said tubes, whereby said tubes may bemaintained at a high temperature and the said body heated by radiation.

' WILLIAM J. PAUL.

JOHN H. LYNCH. JAMES G. MEYER. In presence of JOHN H. LYNCH, Jr, WILLIAMG. CHRISTIE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

. Washington, I). G.

